Question

On treating roll sulphur with an aqueous solution of calcium hydroxide:
(A) Plastic sulphur is prepared
(B) Milk of sulphur is prepared
(C) Rhombic sulphur is prepared
(D) Roll sulphur

Answer 1

Hint: We need to see the reaction of sulphur with calcium hydroxide in aqueous medium. Roll sulphur is sulphur in the form of rods or sticks made by casting molten sulphur. The sulphur formed is used in treatment of skin diseases.

Complete step by step answer
From the above question we can say that,
When sublimed sulphur is boiled with lime water, the lime is removed from the precipitate by washing with dil. HCl; this is known as milk of sulphur and is used for treatment of various skin orders.
So, we need to select the correct answer.
The correct answer is B.

Note
Sulphur is a non-metallic chemical element that is an essential element for all life, resembles oxygen in chemical properties, and is used especially in the form of sulfuric acid to extract phosphorus from ores. Sulphur occurs naturally as the element, often in volcanic areas. This has traditionally been a major source for human use. If im purified fossil fuels are burnt, sulphur dioxide can enter the atmosphere, leading to acid rain.
Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula $ Ca{\left( {OH} \right)_2} $ . It is a colourless crystal or white powder and is produced when quicklime (calcium oxide) is mixed, or slaked with water. Calcium hydroxide is an odourless white powder. It's used in industrial settings, such as sewage treatment, paper production, construction, and food processing. It also has medical and dental uses.
We already know that Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.